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Selected Publication:

Sinn, G; Muller, U; Konnerth, J; Rathke, J.
(2012): Strain Measurements within Fibre Boards. Part II: Strain Concentrations at the Crack Tip of MDF Specimens Tested by the Wedge Splitting Method
MATERIALS. 2012; 5(8): 1495-1507. FullText FullText_BOKU

Abstract:
This is the second part of an article series where the mechanical and fracture mechanical properties of medium density fiberboard (MDF) were studied. While the first part of the series focused on internal bond strength and density profiles, this article discusses the fracture mechanical properties of the core layer. Fracture properties were studied with a wedge splitting setup. The critical stress intensity factors as well as the specific fracture energies were determined. Critical stress intensity factors were calculated from maximum splitting force and two-dimensional isotropic finite elements simulations of the specimen geometry. Size and shape of micro crack zone were measured with electronic laser speckle interferometry. The process zone length was approx. 5 mm. The specific fracture energy was determined to be 45.2 +/- 14.4 J/m(2) and the critical stress intensity factor was 0.11 +/- 0.02 MPa.
Authors BOKU Wien:
Konnerth Johannes
Müller Ulrich
Sinn Gerhard
BOKU Gendermonitor:


Find related publications in this database (Keywords)
electronic laser speckle interferometry
wedge splitting
medium density fiber board
fracture mechanics
process zone


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